#29: the 'develop' branch is now ready for development

In trying to follow git-flow conventions, I've decided that the develop
branch builds as version 'develop-SNPASHOT'.

Actual version numbers are not given on the develop branch. They are
given on the release branch which prepares a new release to be merged
to master.
Fix obsolete package names in text of README.md

Merge branch 'readme-fixes' into develop

* readme-fixes:
  readme: the include instant parsers were folded into us.bpsm.edn.parser
  readme: package bpsm.edn is now us.bpsm.edn
  readme: parseable input can be created form any Readable
Printer no longer escapes ' in string values

The string "'" used to print as "\'", now it prints as "'".
set version in pom.xml to 0.4.1 for release
update version to 0.4.1 in README.md
Merge branch 'release/0.4.1'

* release/0.4.1:
  update version to 0.4.1 in README.md
  set version in pom.xml to 0.4.1 for release
  Printer no longer escapes ' in string values
  #29: the 'develop' branch is now ready for development